Flight OddsAS459 BOS → SEA
Alaska Airlines · Boston, MA to Seattle, WA · 364 flights observed, 2025-07-01 to 2026-06-30 · 2,496 mi
On-time arrival
73%
Median delay
-1 min
90th percentile
+38 min
Cancellation rate
1%
How often is AS459 on time?
Across 364 flights on BOS → SEA from 2025-07-01 to 2026-06-30, AS459 arrived within 15 minutes of schedule 73% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +38 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 261 | 73% |
| 16-30 min | 47 | 13% |
| 31-60 min | 36 | 10% |
| 61-120 min | 9 | 3% |
| 2+ hrs | 5 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 55% | +17 min |
| 2025-08 | 31 | 84% | -1 min |
| 2025-09 | 30 | 87% | -4 min |
| 2025-10 | 31 | 90% | -13 min |
| 2025-11 | 29 | 90% | -9 min |
| 2025-12 | 29 | 28% | +31 min |
| 2026-01 | 29 | 76% | +6 min |
| 2026-02 | 26 | 73% | 0 min |
| 2026-03 | 31 | 39% | +27 min |
| 2026-04 | 30 | 83% | +7 min |
| 2026-05 | 31 | 84% | -10 min |
| 2026-06 | 30 | 87% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 48 | 75% |
| Tue | 52 | 67% |
| Wed | 52 | 73% |
| Thu | 51 | 73% |
| Fri | 51 | 75% |
| Sat | 52 | 73% |
| Sun | 52 | 75% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…